My ZoneAlarm Pro 9.1.008.000 zclient.exe creates at each boot a temporary file but does not remove it at computer shut down.
Because of this defect, these abandoned temporary files accumulate in C:\Documents and Settings\[windows-userid]\Local Settings\Temp and must be removed manually.
The vsmon.exe executable creates a temporary file (e.g. ZLT06b44.TMP) in C:\WINDOWS\Temp at each boot but does remove it at normal shut down.
XP Home SP3